High Quality: Locking wheel nut extractor set with high power and impact resistance. Bolt nut extractor processed from high-hardness chrome molybdenum steel, reverse spiral flutes are designed to bite downward to provide maximum gripping power. 3/8'' Square Drive: Extractor sets have hex flats for use with open-end wrench, pliers, adjustable wrench, sockets or Vise-Grip locking pliers, 3/8'' square drive for use with hand ratchets, impact wrenches and air ratchets. Design: Spiral socket design provides a secure connection on the rounded fastener to be extracted. These nut extender sets have a black oxide surface for greater strength and durability and prevents corrosion. Multifunctional: The twist socket set is suitable for removing rust and wear, as well as covering the paint coating of nuts and bolts. The bolt remover provides maximum gripping power to easily remove broken, damaged, or rusted nuts, bolts, and screws. 17*9.5*4cm